Crusher roll



July w, 1923.

EAfiLUEfi r. A. HIBBINS CRUSHER ROLL Filed Dec. 7, 1922 2 Shanta-Sheet 1 33 6/ to be reduced.

Patented duly 1%, i923.

warren trainee earner THOMAS A. HIBIBINS, 0F WELLSVILLE, OHIO, ASSIGNOI TO THE STEVENSON COM- PANY, OF VJELLSVILLE, OHIO, A. CORPORATION OF OHIO.

CRUST-IE3 ROLL.

Application filed December 7, 1922. Serial No. 605,349.

T 0 all whom it may concern Be it known that I, THOMAS A. IIIBBINs, a citizen of the United States, and a resident of lVellsville. in the county of Columbiana and State of Ohio, have invented certain new lrusher Rolls, of which the following is a specification. I

My invention relates to crushing rolls for crushing machines in which hard materials such as rocks, stones, clays, shales, etc. are In such machines great strength is requisite, particularly in'the roll and breaking plate which cooperate to crush and reduce. The rolls are usually provided with teeth of varying arrangement and length, which serve to feed the material through the machine and to cooperate with the breaker plate to accomplish the required reduction of the materials. 1

In the prior art some of these rolls have been cast as one piece, therefore requiring an entirely new roll in case any ofthe teeth were broken or worn. In other prior structures the roll is built up of laminations, but this arrangement requires dismantling of the machine, removal of the roll and roll shaft, dismantling of the roll, the withdrawal of the defective tooth laminations, and the application of a new lamination and reassembly of the parts.

The object of my invention is to overcom the objections of thestructur'es of the prior art by providing renewable spacing or wearing plates or blocks for the roll teeth. These wearing fittings may be made of very hard and good wearing material such as oil tempered carbon steel, and the use of such wearing fittings will permit the use of lower grade metals for the roll body, thus reducing the cost of the roll structure. Simple means are provided for securing these wearing plates without requiring dismantling of the machine or roll. If a plate has become broken or worn, the operator need only stop the machine, bring the drum around to the top so that access may be had to the. defective plate, then removing this plate and securing another one in its place. The cost of material and labor for such repairs is very little indeed. My invention has the further advantage that the diameter of a roll may be considerably increased without increasing the size of the roll body. To increase the diameter the height of the wearand useful Improvements in f ing drawing forming part ofthis specification,

Fig. 1 is aplan view of my improved roll, Fig. 2 is an enlarged end elevational view thereof,

Fig. 3 is a sectional view on plane 3-3, Fig. 2 but drawn to the scale of Fig. 1, a Fig. 4 an enlarged sectional view on plane l4, Fig. 3, i

I Fig. 5 is a perspective view of a wearing plate for the long teeth, and

Fig. 6 is a perspective view of the wearing fitting for the shorter teeth. i

The cylindrical core 10 of the roll is a simple integral casting of some low grade .R'lGtal'SUCh as cast iron, the body being provided in its ends with the passageways 11 and 12 for the supporting shaft 13 to which the body is rigidly keyed or otherwise secured. Cast integral with the roll body and extending radially therefrom are long teeth or abutments 14, short teeth or abutments 15, and intermediate teeth or abutments 16. These teeth or abutmentsmay be arranged desired. As shown the long teeth are arranged in horizontal rows. the intermediate teeth being between the long teeth, while the short teeth or abutments 15 extend in longitudinal rows alternately with the long and intermediate teeth rows. The

short teeth may be separate teeth or one continuous abutment as shown and'in front of such abutment is a seating channel or socket 17, while in front of the rows of long and intermediate teeth are the channels or sockets 18. These channels serve to receive facing or wearingplates of hard material such as oil-hardened carbon steel. The facing material for the teeth 15 is in the form of rectangular blocks or bars 19, three being shown for each channel, these blocks being secured by means of screws 20 countersunk into the blocks and threaded into the roll body. For the long and intermediate teeth separate wearing plates or blocks could be provided but as shown I utilize wearing plates of inverted T-shape having the body section. 21 of a height to extend in front of and a distance above the long teeth and lateral wings 22 and 23 each engaging in front of one-half of the adjacent intermediate teeth and a distance above such teeth as clearly shown in Fig. 4. These wearing plates areinserted inthechannels 18 which they fill longitudinally and each block is secured by means of a bolt 24 extending through the center of the block and through the long tooth, each long tooth be ing provided with a pocket or depression for receiving the nut 25 for the supporting bolt. The bolt heads are preferably countersunk into the blocks so that the bolts will be amply protected against the material on which'the roll is operating. The'various plates fit snugly in their seating channels and are rigidly held therein by the bolts or screws and 'they form a protecting facing for protecting the teeth or abutments against the material which is being reduced, and being of very hard metal they will last a long time. As shown the long teeth in al" ternate rows are staggered so thatin travcling circumferentially in a diametral plane the material to be crushed will encounter first a long tooth, then an intermediate tooth and then the short tooth so that la'rgeand small masses are well taken care or and elficient and uniform crushing is assured.

To strengthen the ends of the rolland the toothrows and to assist in keeping the material on the rollends flanges 27 and 28 are provided which are cast integral with the roll body. T i i i With my improved construction there is great'saving in material an d labor. Where the rolls are cast in one piece with the teeth integral therewith, the facing plates alone are worn and whenever a plate is broken or worn away it can be readily replaced and there will be no need of providing an entirely new roll. Neither will it be necessary to dismantle the'machine and the roll'as in such structures where the roll is built up of laminations. lVith my construction all that is necessary is to remove the defective wearing plates by withdrawing the screws or bolts and applying new plates. A machine need therefore be out of commission only a very short time.

The relative height of the wearing plates can be made as desired depending upon the nature of the material to be treated. This can be readily accomplished by providing higher or shorter plates as desired. My improved arrangement also enables me to readily change the diameter of a roll through a considerable range. By providing wearing plate sets of different heights a roll structure canbe built up on the same size as body so that it can be used in machines of different size. For example, by applying one set of wearing plates an 18 inchroll structure is provided. and by applying a different set of wearing plates to the same roll body a roll structure of 21. inches diameter will result. Such varying of the diameter of the roll structure is very simple and inexpensive and can be quickly accomplished.

I do not desire to be limited to the exact construction and arrangement shown and described as changes can be made which will still come within the scope ot the invention. .l claim as follows: l

l. A crusher roll structure for crushing machines comprising the roll body, longitudinal rows of long teeth on said'body and shorter teethbetween said long teeth in said rowsfa channel infront of each row, a wearing plate Of lllltll material seated in said channel in front of each long tooth and having extensions engaging in front of part of the adjacent shorter teeth, and means for detachaliilybecuring each plate to the corresponding long tooth.

2. A crusher roll structure for crushing machines comprising a body part in the form of a. casting, longitudinal rows of teeth, each row having alternately long and short teeth and the teeth of one row being staggered relative to the teeth of the next row, a seating'channel in front of each row, and a wearing plate seated in the channel in front or each long tooth and in front of onehall of the adjacent short teeth. and means for detachably securing each plate to the corresponding long tooth, said plate extending a distance above the respective'teeth. A crusher roll structure for crushing machines comprising the roll body, longitudinal rows oi"; long'teeth on saidbody and shorter teeth between said long teeth in said rows, channels'i'n front of said rows, a wearing plate of hard material seated in the channel in front of each long tooth and having extensions engaging in front of part of the adjacent shorter teeth, and means for detac'hably securing each plate.

In witness whereof, I hereunto subscribe my name this 27th day of ll'ovember A. D., 1922.

THOMAS A. HIBBINS. 

